[NT 10-Q] Horizon Space Acquisition I Corp. SEC Filing

Horizon Space Acquisition I Corp. (HSPO) notified the SEC that it will file its Quarterly Report on Form 10-Q for the period ended September 30, 2025 late.

Rhea-AI Filing Summary

Horizon Space Acquisition I Corp. (HSPO) notified the SEC that it will file its Quarterly Report on Form 10-Q for the period ended September 30, 2025 late. The company explains it needs additional time to assemble documents requested by its auditors and expects to file the Form 10-Q within the fifth calendar day after the original due date.

The company also anticipates a significant change in its results of operations for the three months ended September 30, 2025 compared with the same period in 2024, primarily due to deposits of extension fees into its trust account. As of September 30, 2024, a total of $840,000 in extension fees had been deposited, compared with $2,160,000 as of September 30, 2025.

Insights

SPAC and SEC reporting analyst

HSPO filed a late 10-Q notice, citing audit prep and higher SPAC extension fees.

Horizon Space Acquisition I Corp. is using Form 12b-25 to disclose that its Form 10-Q for the quarter ended September 30, 2025 will be filed after the deadline. The stated reason is the need for additional time to assemble documents requested by auditors, which is a procedural issue rather than a disclosed business setback.

The company indicates a significant change in quarterly results versus the prior year, driven mainly by SPAC extension mechanics rather than core operations. Extension fee deposits into the trust account increased from $840,000 as of September 30, 2024 to $2,160,000 as of September 30, 2025, reflecting continued use of extensions to maintain time to complete a business combination.

The notice also states that the Form 10-Q is expected to be filed within the five-day grace period allowed for a quarterly report under Rule 12b-25. Actual implications for cash, timing of any potential business combination, and long-term value will depend on details that will appear in the forthcoming 10-Q rather than in this notification.

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Accepted by SEC EDGAR 11/17/2025 - 04:00 PM Learn about SEC filing dates

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 12b-25

NOTIFICATION OF LATE FILING

(Check One):	☐ Form 10-K    ☐ Form 20-F    ☐ Form 11-K    ☒ Form 10-Q    ☐ Form N-SAR    ☐ Form N-CSR
	For Period Ended: September 30, 2025
	☐ Transition Report on Form 10-K
	☐ Transition Report on Form 20-F
	☐ Transition Report on Form 11-K
	☐ Transition Report on Form 10-Q
	☐ Transition Report on Form N-SAR
	For the Transition Period Ended: ________________________

Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

If the notification relates to a portion of the filing checked above, identify the item(s) to which the notification relates: ______________

PART I -- REGISTRANT INFORMATION

Horizon Space Acquisition I Corp.

Full name of registrant:

Former name if applicable:

1412 Broadway, 21st Floor, Suite 21V

Address of principal executive office (Street and number):

New York, NY 10018

City, state and zip code

PART II -- RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate.)

	(a)	The reasons described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense;
☒	(b)	The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report of transition report on Form 10-Q or subject distribution report on Form 10-D, or portion thereof will be filed on or before the fifth calendar day following the prescribed due date; and
	(c)	The accountant's statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.

PART III -- NARRATIVE

State below in reasonable detail the reasons why Forms 10-K, 20-F, 11-K, 10-Q, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

Horizon Space Acquisition I Corp. (the “Company”) was unable to file its Quarterly Report on Form 10-Q on a timely basis without incurring undue hardship and expense, because the Company requires additional time to work internally to assemble certain documents as required by the auditors to finalize the Form 10-Q. The Company anticipates that it will file the Form 10-Q no later than the fifth calendar day following the prescribed filing date.

PART IV -- OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this notification

	Mingyu (Michael) Li		65		88166675
	(Name)		(Area Code)		(Telephone Number)

(2)	Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If the answer is no, identify report(s).
	☒ Yes    ☐ No
(3)	Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?
	☒ Yes    ☐ No

If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.

The Company anticipates that there will be a significant change in its results of operations for the three months ended September 30, 2025, as compared to the three months ended September 30, 2024, primarily as a result of the deposit of the extension fee into the Company’s trust account.

To effectuate each monthly extension to extend the timeline the Company had to complete a business combination, as of September 30, 2024 and 2025, a total of $840,000 and $2,160,000 had been deposited into the Company’s trust account, respectively.

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Horizon Space Acquisition I Corp.

(Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.

Date: November 17, 2025	By	/s/ Mingyu (Michael) Li
		Mingyu (Michael) Li
		Chief Executive Officer

INSTRUCTION. The form may be signed by an executive officer of the registrant or by any other duly authorized representative. The name and title of the person signing the form shall be typed or printed beneath the signature. If the statement is signed on behalf of the registrant by an authorized representative (other than an executive officer), evidence of the representative's authority to sign on behalf of the registrant shall be filed with the form.

ATTENTION

Intentional misstatements or omissions of fact constitute Federal criminal violations. (See 18 U.S.C. 1001).

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